π+−pScattering and Phase-Shift Analysis at 310 Mev

At the 184-inch synchrocyclotron in Berkeley, data were obtained on elastic pi /sup +/-scattering at 310 Mev. Quantities measured were the differential cross section, the total cross section, and the polarization of the recoil protons as a function of center-of-mass angle. The data were analyzed in terms of S, P, and D waves and only one acceptable solution was obtained--the Fermi type phase shift. Errors on the small phase shift were reduced to less than 1 deg . (B.O.G.)